When I managed to log as administrator in safe mode (despite my current account has administrator) I was unable to get permission tab by right click of Data.dat file. All were the same as in earlier case. Despite under administrator account in safe mode as in guest account (I have created) in normal mode, I can freely use Microsoft Word and other office ones. But under current account in safe and normal mode I get the error. So maybe I need manually write this account in Data.dat. There are about dozen lines in this file despite the latina-like text with some strange characters is not understandable. So administrator and guest are allowed to use it so maybe I need to recover some other file so permission capability. I have probably deleted it after cleaning account folder for additional space?